/*
*  Copyright (C) 1998-2021 by Northwoods Software Corporation. All Rights Reserved.
*/
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "../../../release/go"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var go = require("../../../release/go");
    // A custom Tool for moving a label on a Node
    var NodeLabelDraggingTool = /** @class */ (function (_super) {
        __extends(NodeLabelDraggingTool, _super);
        function NodeLabelDraggingTool() {
            var _this = _super.call(this) || this;
            _this.name = 'NodeLabelDragging';
            /** @type {GraphObject} */
            _this.label = null;
            /** @type {Point} */
            _this._offset = new go.Point(); // of the mouse relative to the center of the label object
            /** @type {go.Spot} */
            _this._originalAlignment = null;
            /** @type {Point} */
            _this._originalCenter = null;
            return _this;
        }
        /**
         * This tool can only start if the mouse has moved enough so that it is not a click,
         * and if the mouse down point is on a GraphObject "label" in a Spot Panel,
         * as determined by findLabel().
         * @this {NodeLabelDraggingTool}
         * @return {boolean}
         */
        NodeLabelDraggingTool.prototype.canStart = function () {
            if (!go.Tool.prototype.canStart.call(this))
                return false;
            var diagram = this.diagram;
            if (diagram === null)
                return false;
            // require left button & that it has moved far enough away from the mouse down point, so it isn't a click
            var e = diagram.lastInput;
            if (!e.left)
                return false;
            if (!this.isBeyondDragSize())
                return false;
            return this.findLabel() !== null;
        };
        /**
         * From the GraphObject at the mouse point, search up the visual tree until we get to
         * an object that has the "_isNodeLabel" property set to true, that is in a Spot Panel,
         * and that is not the first element of that Panel (i.e. not the main element of the panel).
         * @this {NodeLabelDraggingTool}
         * @return {GraphObject} This returns null if no such label is at the mouse down point.
         */
        NodeLabelDraggingTool.prototype.findLabel = function () {
            var diagram = this.diagram;
            var e = diagram.firstInput;
            var elt = diagram.findObjectAt(e.documentPoint, null, null);
            if (elt === null || !(elt.part instanceof go.Node))
                return null;
            if (elt.part instanceof go.Node) {
                elt.part.isSelected = true;
            }
            while (elt.panel !== null) {
                if (elt._isNodeLabel && elt.panel.type === go.Panel.Spot && elt.panel.findMainElement() !== elt)
                    return elt;
                elt = elt.panel;
            }
            return null;
        };
        /**
         * Start a transaction, call findLabel and remember it as the "label" property,
         * and remember the original value for the label's alignment property.
         * @this {NodeLabelDraggingTool}
         */
        NodeLabelDraggingTool.prototype.doActivate = function () {
            this.startTransaction('Shifted Label');
            this.label = this.findLabel();
            if (this.label !== null) {
                // compute the offset of the mouse-down point relative to the center of the label
                this._offset = this.diagram.firstInput.documentPoint.copy().subtract(this.label.getDocumentPoint(go.Spot.Center));
                this._originalAlignment = this.label.alignment.copy();
                if (this.label !== null && this.label.panel !== null) {
                    var main = this.label.panel.findMainElement();
                    if (main !== null) {
                        this._originalCenter = main.getDocumentPoint(go.Spot.Center);
                    }
                }
            }
            go.Tool.prototype.doActivate.call(this);
        };
        /**
         * Stop any ongoing transaction.
         * @this {NodeLabelDraggingTool}
         */
        NodeLabelDraggingTool.prototype.doDeactivate = function () {
            go.Tool.prototype.doDeactivate.call(this);
            this.stopTransaction();
        };
        /**
         * Clear any reference to a label element.
         * @this {NodeLabelDraggingTool}
         */
        NodeLabelDraggingTool.prototype.doStop = function () {
            this.label = null;
            go.Tool.prototype.doStop.call(this);
        };
        /**
         * Restore the label's original value for GraphObject.alignment.
         * @this {NodeLabelDraggingTool}
         */
        NodeLabelDraggingTool.prototype.doCancel = function () {
            if (this.label !== null && this._originalAlignment !== null) {
                // this.label.alignment = this._originalAlignment;
                var node = this.label.part;
                this.diagram.model.set(node.data, 'labelAlignment', this._originalAlignment);
            }
            go.Tool.prototype.doCancel.call(this);
        };
        /**
         * During the drag, call updateAlignment in order to set the GraphObject.alignment of the label.
         * @this {NodeLabelDraggingTool}
         */
        NodeLabelDraggingTool.prototype.doMouseMove = function () {
            if (!this.isActive)
                return;
            this.updateAlignment();
        };
        /**
         * At the end of the drag, update the alignment of the label and finish the tool,
         * completing a transaction.
         * @this {NodeLabelDraggingTool}
         */
        NodeLabelDraggingTool.prototype.doMouseUp = function () {
            if (!this.isActive)
                return;
            this.updateAlignment();
            this.transactionResult = 'Shifted Label';
            this.stopTool();
        };
        /**
         * Save the label's GraphObject.alignment as an absolute offset from the center of the Spot Panel
         * that the label is in.
         * @this {NodeLabelDraggingTool}
         */
        NodeLabelDraggingTool.prototype.updateAlignment = function () {
            if (this.label === null)
                return;
            var last = this.diagram.lastInput.documentPoint;
            var cntr = this._originalCenter;
            if (cntr !== null) {
                var align = new go.Spot(0.5, 0.5, last.x - this._offset.x - cntr.x, last.y - this._offset.y - cntr.y);
                // this.label.alignment = new go.Spot(0.5, 0.5, last.x - this._offset.x - cntr.x, last.y - this._offset.y - cntr.y);
                var node = this.label.part;
                this.diagram.model.set(node.data, 'labelAlignment', align);
            }
        };
        return NodeLabelDraggingTool;
    }(go.Tool));
    exports.NodeLabelDraggingTool = NodeLabelDraggingTool;
});
// export = NodeLabelDraggingTool;
